The electric height-adjustable desk, as a modern office furniture piece, embodies several key features:

First and foremost, the electric height-adjustable desk boasts the functionality of automatic height adjustment. Users can easily control the desk's height with the push of a button or a remote control, allowing for swift adjustments. This electrically-driven mechanism not only provides convenience and speed but also significantly reduces the physical strain of manual adjustments.

Secondly, the electric height-adjustable desk offers a wide range of height adjustability. Whether it be for adults or children, users can effortlessly find the most suitable height for their needs. This adjustable height feature enables the desk to accommodate users of different heights and work requirements, delivering a more personalized user experience.

Moreover, the electric height-adjustable desk comes with intelligent capabilities. Some high-end models are equipped with height sensors and controllers that automatically sense the user's height and working habits, adjusting the desk height accordingly for smart control. This intelligent design enhances the convenience and comfort of using the electric height-adjustable desk.

In terms of design philosophy, the electric height-adjustable desk is primarily based on ergonomic principles, aiming to better adapt to users' needs. Considering user comfort and health during the design process, the desk's height adjustment facilitates sit-stand working, alleviating fatigue and discomfort from prolonged sitting. Additionally, emphasis is placed on the desk's scalability and environmental friendliness, utilizing materials that meet eco-friendly standards to ensure product quality and safety.

In conclusion, the electric height-adjustable desk, with its features of automatic adjustment, height adjustability, and intelligence, coupled with ergonomic design principles, offers users a more comfortable, healthy, and efficient office environment.